The harmful effects that smog can have on peo...

The harmful effects that smog can have on people's health are one of the top ______ of those who live in some cities.

A.concerns B.conflicts

C.characters D.charges

高三英语单项填空中等难度题查看答案及解析

There is an ongoing debate about the potentially harmful effects ________ text messaging can have on people's grammar.

A．what 　    B．who 　

C．that　    D．whose

高三英语单项填空简单题查看答案及解析

I find it interesting that even the ordinary happenings can have an effect on our experiences.My wife and I moved into our house nine years ago.We spent a lot of time and energy in the yard.There were some rocks there. Whenever we had found flowers,we would plant them,just to bring some color to the area.

Last summer I found a little plant that I could not immediately recognize.I knew I didn’t plant it and Denise said that she didn't,either.We decided to let it continue growing until we could find out what it was.

Weeks passed and as I made my way back to the mysterious plant,it appeared to be a sunflower.It was spindly（瘦弱的）and had only one head on it.I decided to baby it along and weed around it.As I pulled rocks from the area to get to the weeds,I noticed something unusual.The sunflower had not started where I saw the stalk（茎）begin.It actually had begun under a big rock and grown under around it to reach the sun.

That's when I realized that if a little sunflower didn't let a big rock stand in its way of developing,we too have the abilities to achieve our desires.Like the sunflower,it knew it had the ability to get over the difficulty and succeed because it had faith.

1.The underlined word "them" in Paragraph 1 refers to　　　 .

A. rocks　　 B. flowers

C. happenings　　 D. experiences

2.What unusual things did the author find?

A. There was only one head on the sunflower.

B. The sunflower had pushed away a big rock.

C. The stalk of the sunflower was tall and thin.

D. The sunflower grew under and around a big stone.

3.According to the passage,if one wants to achieve success,he/she first need　　　 .

A. others' help　　 B. great abilities

C. self-confidence　　 D. a happy environment

4.What would be the best title for the passage?

A. Grow up to be strong with more sunlight.　　 B. Make the environment support you.

C. Stand tall like the sunflower.　　 D. Be proud of yourself.

高三英语阅读理解中等难度题查看答案及解析

16. Nothing taught by others can have the same effect on you as _____ learned by yourself.

高三英语单项填空简单题查看答案及解析

— Stress can be extremely harmful to your health. Exercise, ______, can reduce its bad effects.

— I can’t agree more.

A. therefore            B. meanwhile            C. besides            D. otherwise

高三英语单项填空中等难度题查看答案及解析

The Dangers of Secondhand Smoke

Most people know that cigarette smoking is harmful to their health. Scientific research shows that it causes many kinds of diseases. 　　 1.　　 However, Edward Gilson has lung cancer, and he has never smoked cigarettes. He lives with his wife, Evelyn, who has smoked about a pack of cigarettes a day throughout their marriage. The Gilsons have been married for 35 years.

No one knows for sure why Mr. Gilson has lung cancer. However, doctors believe that secondhand smoke may cause lung cancer in people who do not smoke because nonsmokers often breathe in the smoke from other people’s cigarettes.　 _2.　　 The US Environmental Protection Agency reports that about 53, 000 people die in the United States each year as a result of exposure to secondhand smoke.

The smoke that comes from a lit cigarette contains many different poisonous chemicals. In the past, scientists did not think that these chemicals could harm a nonsmoker’s health.　 　　 3.　　 They discovered that even nonsmokers had unhealthy amounts of these toxic (有毒的) chemicals in their bodies. 　　 4.　　 For example, we cannot avoid secondhand smoke in restaurants, hotels and other public places. Even though many public places have nonsmoking areas, smoke flows in from the areas where smoking is permitted. It is even harder for children to avoid secondhand smoke. In the United States, nine million children under the age of five live in homes with at least one smoker.

Research shows that children who are exposed to secondhand smoke are sick more often than children who live in homes where no one smokes and that the children of smokers are more than twice as likely to develop lung cancer when they are adults as the children of nonsmokers. The risk is even higher for children who live in homes where both parents smoke.

5. 　 As a result, they have passed laws which prohibit people from smoking in many public places.

A. Recently, though, scientists changed their opinion after they studied a large group of nonsmokers.

B. As a matter of fact, almost all of US breathe tobacco smoke at times, whether we realize it or not.

C. In fact, many people who smoke get lung cancer.

D. However, secondhand smoke is dangerous to all people, old or young.

E. People are becoming very aware of the dangers of secondhand smoke.

F. This smoke is called secondhand smoke.

G. Many people, including doctors, parents, teachers, and others, are concerned about the health risks of cigarette smoking.

高三英语其他题中等难度题查看答案及解析

The negative health effects of being economical on sleep during the week can't be reversed by marathon weekend sleep sessions, according to a new study.

Researchers have long known that routine sleep lack can cause weight gain and increase other health risks,including diabetes. But those who force themselves out of bed sleepy each weekday after too few hours of shut-eyed, hope that shutting off the alarm on Saturday and Sunday will repay the weekly sleep debt and compensate any ill effects.

The research, published in Current Biology, crushes those hopes. Despite complete freedom to sleep in and nap during a weekend recovery period, participants in a sleep laboratory who were limited to five hours of sleep on weekdays gained nearly three pounds over two weeks and experienced metabolic disruption （新陈代谢紊乱）that would increase their risk for diabetes over the long term. While weekend recovery sleep had some benefits after a single week of insufficient sleep, those gains were wiped out when people plunged back into their same sleep-deprived （剥夺） schedule the next Monday.

"If there are benefits of catch-up sleep, they're gone when you go back to your routine. It's very short-lived," said Kenneth Wright, director of the sleep and chronobiology laboratory at the University of Colorado, who oversaw the work. "It's kind of like smoking once was — people would smoke and wouldn't see an immediate effect on their health, but people will say now that smoking is not a healthy lifestyle choice. I think sleep is in the early stage of where smoking used to be. ”

Michael　 Grandner , director of the sleep and health research program said that the study reinforces the concept that people need to stop thinking of sleep as a balance sheet. Imagine a person who ate nothing but cheeseburgers and french-fries Monday through Friday, but dined only on celery and kale on the weekend and tried to call that a healthy diet. Hugely cutting calories all week and then eating a giant pizza on Saturday wouldn't restore balance either.

1.According to the passage what is the possible result of lack of sleep?

A.Weight loss in a long run.

B.Higher risks of diabetes.

C.Being too weak to marathon.

D.Dying a premature death.

2.What does Wright want to show about catch-up sleep by mentioning smoking?

A.The influence is long-term.

B.The benefits are subtle.

C.The consequence is overlooked.

D.The immediate effects are obvious.

3.Those who favor weekend recovery sleep are likely to believe that______.

A.junk food can be balanced by occasional healthy diets

B.cheeseburgers and french-fries are healthy diets

C.celery and kale are healthy if eaten on the weekend

D.Saturday pizzas are very helpful to gain weight

4.The passage is intended to______.

A.deny a previous concept B.introduce a new study

C.promote a healthy lifestyle D.compare two studies

高三英语阅读理解中等难度题查看答案及解析

The effects of coffee consumption on health have long been a subject of conflict and uncertainty.Since the 1980s,some have spoken out against coffee as harmful to health,while others have welcomed coffee for its supposed benefits to health.

According to a scientific report,mild coffee consumption,three to five cups per day,can he taken as a healthy dietary pattern,along with other healthful behaviors.The report also says that coffee consumption helps reduce the risk of heart disease and it protects against Parkinson's disease.

According to Dr.Donald Hensrud of Mayo Clinic,high consumption of coffee has health risks.Dr.Hensrud mentions the dangers of high coffee consumption for people with a certain illness that slows the breakdown of caffeine in the body.Some studies said that drinking two or more cups of coffee daily can actually increase the risk of heart disease in these people.

According to conclusions from a recent study led by Dr.Gregory Marcus,a doctor from the University of California San Francisco,daily moderate consumption of caffeine,less than 4 cups,is not associated with these issues.

Until the scientific community reaches a general agreement on the effects of coffee consumption on human health,it will be up to the individual to decide whether the benefits of drinking coffee are greater than the risks.

When informed of these possible health benefits and harms of drinking coffee,Harwood,a high school student stated,"Even though there might be some negative effects of drinking coffee,for the most part,coffee drinking sounds good for health.Not to mention I need coffee to stay awake."

1.What is the people's attitude towards the effects of coffee on health according to Paragraph 1?

A. Disapproving.　　 B. Tolerant.

C. Doubtful.　　 D. Mixed.

2.What does the underlined word "moderate" in Paragraph 4 probably mean?

A. Personal.　　 B. Slight.

C. Reasonable.　　 D. Heavy.

3.What can we infer about Harwood?

A. He'll keep on drinking coffee.　　 B. He loves his high school life.

C. He often falls asleep in class.　　 D. He has some health problems.

4.What would be the best title for the text?

A. Why People Love Coffee?　　 B. How Coffee Affects Health?

C. The Culture of Coffee Drinking　　 D. The New Findings of Heart Disease

高三英语阅读理解中等难度题查看答案及解析

The effects of coffee consumption on health have long been a subject of conflict and uncertainty. Since the 1980s, some have spoken out against coffee as harmful to health, while others have welcomed coffee for its supposed benefits to health.

According to a scientific report, mild coffee consumption, three to five cups per day, can be taken as a healthy dietary pattern, along with other healthful behaviors. The report also says that coffee consumption helps reduce the risk of heart disease and it protects against Parkinson’s disease.

According to Dr. Donald Hensrud of Mayo Clinic, high consumption of coffee has health risks. Dr. Hensrud mentions the dangers of high coffee consumption for people with a certain illness that slows the breakdown of caffeine in the body. Some studies said that drinking two or more cups of coffee daily can actually increase the risk of heart disease in these people.

According to conclusions from a recent study led by Dr. Gregory Marcus, a doctor from the University of California San Francisco, daily moderate consumption of caffeine, less than 4 cups, is not associated with these issues.

Until the scientific community reaches a general agreement on the effects of coffee consumption on human health, it will be up to the individual to decide whether the benefits of drinking coffee are greater than the risks.

When informed of these possible health benefits and harms of drinking coffee, Harwood, a high school student stated, “Even though there might be some negative effects of drinking coffee, for the most part, coffee drinking sounds good for health. Not to mention I need coffee to stay awake. ”

1.What is the people’s attitude toward the effects of coffee on health according to Paragraph 1?

A. Disapproving.　　 B. Tolerant.

C. Doubtful.　　 D. Mixed.

2.What can we infer about Harwood?

A. He’ll keep on drinking coffee.　　 B. He loves his high school life.

C. He often falls asleep in class.　　 D. He has some health problems.

3.What would be the best title for the text?

A. Why People Love Coffee?　　 B. How Coffee Affects Health?

C. The Culture of Coffee Drinking.　　 D. The New Findings of Heart Disease.

高三英语阅读理解中等难度题查看答案及解析

Nowadays, the food we eat seems to have great effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures.

That food is related to illness is not a new discovery. In 1945, about 68 years ago, government researchers realized that nitrates, commonly used to preserve color in meats, and other food additives, caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this, penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.

1.What is the best possible title of the passage?

A．Drug and Food                         B．Cancer and Health

C．Food and Health                        D．Health and Drug

2.Which of the following statements is NOT true?

A．Drugs are always given to animals for medical reasons

B．Some of the additives in our food are added to the food itself and some are given to the living animals

C．Researchers have known about the potential dangers of food additives for over thirty-five years.

D．Food may cause forty percent of cancer in world.

3.How has science done something harmful to mankind?

A．Because of science, diseases caused by polluted food have been virtually eliminated.

B．It has caused a lack of information concerning the value of food.

C．Because of the application of science, some potentially harmful substances have been added to food.

D．The scientists have preserved the color of meats, but not of vegetables.

4.What are nitrates used for?

A．They preserve flavor in packaged foods.

B．They preserve the color of meats.

C．They are the objects of research.

D．They cause the animals to become fatter.

5.The word 'carcinogenic' most nearly means '_____'.

A．trouble-making     B．color-retaining      C．money-making      D．cancer-causing

高三英语阅读理解中等难度题查看答案及解析